The Stoxx Europe 600 index fell 0.4% to 372.85, with only the consumer-goods group moving higher. On Friday, the pan-European benchmark lost 0.7% (http://www.marketwatch.com/story/spanish-stocks-lead-european-selloff-after-deadly-terrorists-attack-in-barcelona-2017-08-18) in the wake of terrorist attacks in Spain.

Regional stocks were headed for a third consecutive loss as the U.S. and South Korea kicked off annual military exercises (http://www.marketwatch.com/story/tensions-expected-to-rise-as-us-south-korea-start-annual-war-games-2017-08-20), bringing tensions between the U.S. and North Korea back into focus. Pyongyang warned on Sunday that the maneuvers are "reckless behavior, driving the situation into the uncontrollable phase of a nuclear war."

The "start of military exercises between America and South Korea could spark a return to the kind of market-dragging nuclear rhetoric seen a few weeks ago," wrote Spreadex financial analyst Connor Campbell.

Stock movers: But investors did have corporate developments to consider Monday. Maersk (MAERSK-B.KO) jumped 4.1% after the shipping heavyweight reached a deal to sell its oil and gas business for $7.45 billion to French oil producer Total SA (http://www.marketwatch.com/story/total-buys-maersk-oil-unit-in-745-billion-deal-2017-08-21)(TOT) . Total shares were off 0.6%.

"Many leaders, including the Federal Reserve Chair Janet Yellen and the European Central Bank President Mario Draghi will speak about growth, inflation and changes in trade relations due to Trump policies. Yet, no significant policy messages are expected," said LCG's senior market analyst Ipek Ozkardeskaya.

ECB chief Draghi will be watched for any signal that the bank has developed a scenario for winding down monetary easing. On Monday, the euro bought $1.1743, up from $1.1762 late Friday in New York.

Read:Euro slides after ECB hints at no hawkish shift at Jackson Hole (http://www.marketwatch.com/story/euro-slides-after-ecb-hints-at-no-hawkish-shift-at-jackson-hole-2017-08-16)